The given table shows the production of foodgrains A, B and C and their export (as a percentage of production) over five years from 2015 to 2019, Study the table and answer the questions that follow.
Production = Domestic Consumption + Export
The average production of foodgrain B in 2016, 2017 and 2018 is approximately what percentage of the total domestic consumption of foodgrain C in 2015 and 2019?
B's average production in 2016, 2017 and 2018 is $$\frac{200+350+320}{3}=\frac{870}{3}=290$$
C's Domestic produce in 2015 and 2019 = $$350\times\ \frac{70}{100}(=245)$$ and $$325\times\ \frac{60}{100}(=195)$$
=$$440$$
The required percentage is $$\frac{290}{440}\times\ 100=65.9\%$$
The closest approximation go this would be 66% and hence, option c.